Anything that can be plugged into an outlet can be set to a timer. I have timers plugged into the wall for lights, heating pads, monsoon, etc. If you're worried about hearing a monsoon, a timer is an option for you to consider. I do it for convenience. I've owned the Exo Terra RX400 monsoon mister over one year and have been pleased with it. I follow the instructions and put distilled water in the reservoir, which holds about 2 gallons of water. The monsoon has two sprayers for my chameleon terrarium and one for my red eyed tree frog. Humidity is fantastic! I will tell you that it takes some tweaking to determine how often the monsoon needs to mist and for how long. Once you master that, it's all downhill from there!